We look at the division of 486612 by 81 
Let's see how many times 81 fits into 486612.

On to step 1:
If we divide 4 by 81, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 81

Let's proceed to step 2:
48 divided by 81 is 0 with a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 48, we get 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 81

Advancing to step 3:
486 divided by 81 is 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 486 away from 486, we end up with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 81

Step 4:
The number 81 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 60.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 81

Moving on to step 5:
If we divide 61 by 81, we get 0 and a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 600.0
If we subtract 0 from 61, we get 61.
Fetch the next digit (2) from the dividend, attach it to 61 and continue: 612 / 81

Advancing to step 6:
81 can be fit into 612 7 times, resulting in a remainder of 45.
Record the quotient 7 as the next digit in the result. 
Result so far: 6007.0
Deduct 567 from 612 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 7:
The number 81 fits into 450 5 times, leaving a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 6007.5
Deduct 405 from 450 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 8:
The number 81 fits into 450 5 times, leaving a remainder of 45.
The next digit of our result is 5. 
Result so far: 6007.55
Deduct 405 from 450 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final result is 6007.55 with a remainder of 0.045.